public static IApplicationBuilder UseMqttEndpoint(this IApplicationBuilder app, string path = "/mqtt")
{
app.UseWebSockets();
app.Use(async(context, next) =>
{
if (!context.WebSockets.IsWebSocketRequest || context.Request.Path != path)
{
await next();
return;
}
string subProtocol = null;
if (context.Request.Headers.TryGetValue("Sec-WebSocket-Protocol", out var requestedSubProtocolValues))
{
subProtocol = MqttSubProtocolSelector.SelectSubProtocol(requestedSubProtocolValues);
}
var adapter = app.ApplicationServices.GetRequiredService <MqttWebSocketServerAdapter>();
using (var webSocket = await context.WebSockets.AcceptWebSocketAsync(subProtocol).ConfigureAwait(false))
{
await adapter.RunWebSocketConnectionAsync(webSocket, context);
}
});
return(app);
}
static void ConfigureMqttWebSocketEndpoint(IApplicationBuilder app, MqttService mqttService)
{
app.Use(async(context, next) =>
{
if (context.Request.Path == "/mqtt")
{
if (context.WebSockets.IsWebSocketRequest)
{
string subProtocol = null;
if (context.Request.Headers.TryGetValue("Sec-WebSocket-Protocol", out var requestedSubProtocolValues))
{
subProtocol = MqttSubProtocolSelector.SelectSubProtocol(requestedSubProtocolValues);
}
using (var webSocket = await context.WebSockets.AcceptWebSocketAsync(subProtocol).ConfigureAwait(false))
{
await mqttService.RunWebSocketConnectionAsync(webSocket, context).ConfigureAwait(false);
}
}
else
{
context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
}
}
else
{
await next().ConfigureAwait(false);
}
});
}
static void ConfigureWebSocketEndpoint(
IApplicationBuilder application,
MqttServerService mqttServerService,
MqttSettingsModel mqttSettings)
{
if (mqttSettings?.WebSocketEndPoint?.Enabled != true)
{
return;
}
if (string.IsNullOrEmpty(mqttSettings.WebSocketEndPoint.Path))
{
return;
}
var webSocketOptions = new WebSocketOptions
{
KeepAliveInterval = TimeSpan.FromSeconds(mqttSettings.WebSocketEndPoint.KeepAliveInterval),
ReceiveBufferSize = mqttSettings.WebSocketEndPoint.ReceiveBufferSize
};
if (mqttSettings.WebSocketEndPoint.AllowedOrigins?.Any() == true)
{
webSocketOptions.AllowedOrigins.AddRange(mqttSettings.WebSocketEndPoint.AllowedOrigins);
}
application.UseWebSockets(webSocketOptions);
application.Use(async(context, next) =>
{
if (context.Request.Path == mqttSettings.WebSocketEndPoint.Path)
{
if (context.WebSockets.IsWebSocketRequest)
{
string subProtocol = null;
if (context.Request.Headers.TryGetValue("Sec-WebSocket-Protocol", out var requestedSubProtocolValues))
{
subProtocol = MqttSubProtocolSelector.SelectSubProtocol(requestedSubProtocolValues);
}
using (var webSocket = await context.WebSockets.AcceptWebSocketAsync(subProtocol).ConfigureAwait(false))
{
await mqttServerService.RunWebSocketConnectionAsync(webSocket, context).ConfigureAwait(false);
}
}
else
{
context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
}
}
else
{
await next().ConfigureAwait(false);
}
});
}